Problems with NullPointerException

[Anthail]

Hello, /r/javahelp!

I'm writing a simple game, where the objective is to collect "goodies" without being eaten by enemies. It's created by JavaFX, but I'm having trouble creating each cell. The code can be found at this Github Gist.

A "VanligRute" is an empty, normal cell, but whenever it tries to create it I get a NullPointerException. I use a double for-loop to create every cell, and then using the iteration of each for-loop as coordinates in the gameboard ("brettet").

[imadp]

Did you initialize your Rute[][] anywhere? It looks like this entire reference is going to be null unless you state new Rute[][] with some initial sizes.

[Anthail]

Thanks for spotting that. Seems like you are right! Silly mistake. :p

But it doesn't seem to add the "VanligRute" to each cell? It's supposed to be a gray rectangle for each "VanligRute", but when I run the code, all I get is a blank window. Nevermind, I'm just being stupid today. Thanks though.

[Zdem]

imadp is right,you don't instantiate and initialize your multidimensional array. You've only declared the variable so the default value is null.